a from a balloon reaches the ground in 30 sec. Determine the height of the balloon if it at rest in the air
h=gt2/2=9.8⋅302/2=4410 (m)h=gt^2/2=9.8\cdot30^2/2=4410\ (m)h=gt2/2=9.8⋅302/2=4410 (m) . Answer
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